Today I finally got to hook the borrowed gages up to my AC system, armed with all the tips from you guys. The outside temp was about 85 when I started, but it dropped to 80 by the time I quit. I held the car at 1500 rpm with a brick and watched the gages. By the time I had positioned the brick and made it to the front of the car, the high side was 180 and the low 16. It seemed pretty stable until a few minutes later when the low suddenly dropped to 0, and the high crept down to 170. The vent temp is now a steady 80, and that remained like that for the duration of the test. I added a 12 oz. can of R-134a, and the high rose 190 with the low maybe creeping up to 2, but the vent temp staying the same. The connector between exp. valve and evaporator is frosted white. Is this still a low charge, or am I looking at moisture in the system?

I didn't check the sight glass, is it of any use for R-134a?

Quick recap of what happened before: I installed a new compressor, with new exp. valve and receiver drier, and had a shop charge it. It has only cooled marginally ever since. I saw some leakage (dye) out of the high side charging port last week, but cooling was no better or worse.

Thanks for any comments -- Erwin

posted by 209.244.87...

• AC gage values; undercharge or moisture?, Erwin Timmers, Mon, 15 Jul 2002 18:38:47 <-- Viewing This Message
  • Re: AC gage values; undercharge or moisture?, Robert Kaplan, Mon, 15 Jul 2002 21:50:32
    • Re: AC gage values; undercharge or moisture?, Erwin Timmers, Tue, 16 Jul 2002 09:41:53
      • Re: AC gage values; undercharge or moisture?, Robert Kaplan, Tue, 16 Jul 2002 10:24:37
        • It's got to be moisture and what should be wrapped?, Erwin Timmers, Tue, 16 Jul 2002 19:04:22
          • Don't confuse inside and out side moisture,,,,, KeithR, Wed, 17 Jul 2002 00:30:58
          • Here's what I would do, Robert Kaplan, Wed, 17 Jul 2002 00:12:27
    • Re: AC gage values; undercharge or moisture?, Jim Moncrief, Tue, 16 Jul 2002 09:30:59

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